BS 7657:2010

Foreword
1 Scope and references
2 Terms and definitions
3 Classification
4 Characteristics
5 Product information
6 Normal service and mounting conditions
7 Constructional and performance requirements
8 Tests
Annexes
Annex A (informative) - Guide to the uninterrupted rated
        current of fuses under various conditions of
        installation
Bibliography

Describes the requirements for cut-out assemblies up to 100 A rating, for power supply to buildings.

This standard specifies the requirements for cut-out assemblies up to 100 A rating, for power supply to buildings. Each cut-out assembly provides a means of terminating service cables, fuse protection, a neutral facility and/or a means of earthing the supply, and anti-tamper protection. Cut-out assemblies are suitable for use on single-phase or three-phase low-voltage public electricity supply systems with a maximum voltage up to 440 V a.c. and at a frequency of 50 Hz, the neutral being effectively earthed.

The provisions of the general rules dealt with in BS EN 60947-1:2007 are applicable to this standard when specifically called for.

NOTE Clauses and subclauses, tables, figures and annexes of the general rules thus applicable are identified by reference to BS EN 60947-1:2007, for example, BS EN 60947-1:2007, 1.2.3; BS EN 60947-1:2007, Table 1; BS EN 60947-1:2007, Annex A.